Following the release of their third studio album
Seasons in November 2024, Esprit D'Air announced plans for
Aeons as part of their ongoing development. In advance of the album's release, the band previewed material from the record during their 2025 European tour, performing songs in the United Kingdom, Belgium, the Netherlands, Germany, Czech Republic, Poland, Hungary, Italy, Spain, and France.
Composition The first song released from the album, "Lost Horizon", appeared on 28 February 2025.
Metal Hammer featured the track in its
Tracks of the Week column and described it as "sci-fi noir". The second song, "Shadow of Time", was released on 14 March 2025. "Zetsubō no Hikari" followed on 28 March 2025, incorporating elements of nu metal. The fourth track released in advance of the album was "Silver Leaf", on 18 July 2025. The fifth track released was "Chronos" on 19 September 2025, examining humanity's recurrent tendency to repeat past errors and questioning whether people can break free from destructive cycles. It was composed as a thematic reflection on how history can seem trapped on loop, and posits that change begins with individual agency. On 24 October 2025, Esprit D'Air released "Broken Mirror", the sixth and final single before the release of
Aeons. The track is described as one of the album’s heavier and darker songs, exploring themes of internal struggle, self-doubt, and breaking free from expectations. ==Musical style, influences and themes==